Roller bed arrangement of zig-zag mill train



June 18, 1957 HANSPETER LEMM 2,796,163-

ROLLER BED ARRANGEMENT OF ZIG-ZAG MILL; TRAIN Filed March '22, 1954 United States atent O ROLLER BED ARRANGEMENT F ZlG-ZAG MILL TRAEN Hans-Peter Lemm, Dusseldorf, Germany, assignor to Schloemann Aktiengesellsehaft, Dusseldorf, Germany Application March 22, 1954, Serial No. 417 ,7 65

Claims priority, application Germany March 30, 1953 4 Claims. (Cl. 19 8-20) For transporting the material or stock being rolled from one rolling stand to the next rolling stand arranged adjacent to the first on the rolling beds of a zig-zag mill train, change-over arrangements are known composed of rollers set at an oblique angle to the direction in which the stock is discharged from the first rolling stand and extending from one stand to the next. As the stock is delivered from the first of two rolling stands arranged side by side, the rollers rotate in the direction in which the stock is carried. Owing to the oblique setting of the rollers, the stock receives not only its movement in longitudinal direction but also a transverse movement, the angle at which the rollers are set being so chosen that the stock is moved out of its future rolling path of the second stand. This transverse movement is limited by a guide wall provided on the roller bed on the side remote from the second rolling stand. After the stock has left the first rolling stand, the direction of rotation of the roller bed is reversed. The stock then reverses its direction of travel, not only longitudinally but also transversely and runs on to the feed hopper or intake of the second rolling stand.

As the stock being rolled is not fed to the second rolling stand at right angles to the axes of its rollers but at the same time is being moved in transverse direction, it is difficult to introduce properly into the guides. Moreover, the stock lacks the necessary feed pressure.

These objections are overcome by the invention which proposes to coordinate to the oblique roller bed an additional roller bed arranged in the path of rolling of the second or adjacent rolling stand and provided with rollers at right angles to the rolling direction of this stand.

If, in the arrangement according to the invention, the obliquity of the rollers arranged at the delivery end of the first rolling stand is chosen as usual, a transverse movement of the stock in the direction towards the feed roller bed of the second rolling stand can only take place after the oblique roller bed has been reversed. As compared with the known change-over arrangement of the roller beds which can always serve only one stand with the result that as a consequence only one stand can work at a time, the arrangement according to the invention constitutes an improvement because during the time the stock is running from the feed roller bed into the second stand a fresh rod of material can already pass into the first rolling stand. The necessary reversal of the oblique roller bed and the transverse displacement of the material being rolled, however, result in undesirable losses of time.

Conseqently, according to another feature of the invention, the rollers arranged at the delivery end of the first stand are set at such an angle that the material passing out is shifted in transverse direction on to the feed roller bed coordinated to the adjacent or second rolling stand.

Moreover, the rollers of the feed roller bed, which are used as the rod runs out of the first stand and as it runs into the adjacent rolling stand, that is the rollers along the stretch between the end of the feed roller bed remote from the adjacent rolling stand up to the point 2,796,163 Patented June 18, 1957 where it joins the rollers coordinated to the oblique roller bed, are provided with reversible drive, or all or some of the rollers are not driven at all.

Finally, the feed roller bed is also provided with means known per se (stationary or transversely shiftable directing bars and feed hoppers) for introducing the stock into the proper roll pass.

An embodiment of the invention is illustrated by way of example in diagrammatic top plan view in the only figure of the accompanying drawing.

1 and 2 designate juxtaposed rolling stands on a zig-zag mill train. The stock to be rolled runs through the stand 1 in the direction of the arrow 3 and through the stand 2 in the direction of the arrow 4. On the discharge side of the stand 1 an oblique roller bed 5 is arranged, which defiects the stock passing out of the stand 1 on to the roller bed 6. The roller bed 6 serves as feed roller bed for the stand 2. The rollers along the stretch 7 of the roller bed 6 are provided with reversible drive. The other rollers of the roller bed 6, on the other hand, always rotate in the same direction, efiecting a feed in the rolling direction of the stand 2 indicated by the arrow 4.

The stock being rolled in the rolling stand 1 is conveyed along the oblique roller bed 5 into the stretch 7 of the roller bed 6. The rollers located in the stretch 7 of the roller bed 6 rotate in the sense of feed in the same direction as the rollers of the oblique roller bed 5. When the stock has run in its entire length on to the roller bed 6 the rollers along the stretch 7 of the roller bed 6 are reversed and rotate in the opposite direction. The stock is therefore carried to the intake of the stand 2.

However, the next rod has already started in the stand 1. As soon as the front end of this rod reaches the stretch 7 of the roller bed 6, the direction of rotation of the rollers along this stretch is again reversed and the cycle of operations commences afresh.

I claim:

1. A roller bed arrangement for use in a zig-zag rolling mill train or the like, comprising a discharge roller bed comprising a plurality of rollers set at an angle to the direction of emergence of material from a first mill stand, a feed roller bed lying in the same plane as said discharge roller bed and some of said rollers of said discharge roller bed extending between adjacent rollers of said feed roller bed, the feed rollers being alignedwith a second mill stand, a portion of said feed roller bed, adjacent. said second mill stand, including a plurality of rollers constantly driven in a direction to feed material to said second mill stand, a plurality of rollers of said discharge roller bed extending between rollers of said feed roller bed so that a workpiece will be operated on simultaneously by rollers of said discharge roller bed and said feed roller bed during passage of the workpiece over said roller beds.

2. The roller bed arrangement of claim 1, in which said feed roller bed includes a second portion which includes a plurality of reversably driven rollers, said discharge roller bed being arranged to discharge material onto said second portion of said feed roller bed.

3. The roller bed arrangement of claim 1, in which the rollers in said discharge roller bed are constantly driven in the discharge direction.

4. Roller bed arrangement as set forth in claim 1, wherein the rollers along that portion of the feed roller bed between the end of the feed roller bed remote from the rolling stand to the point where it joins the oblique roller bed are reversibly driven.

References Cited in the file of this patent UNITED STATES PATENTS 2,014,855 Lowndes Sept. 17, 1935 2,392,334 Morgan Jan. 8,, 1946 

